An Independent Measurement of the Total Active B-8 Solar Neutrino Flux Using an Array of He-3 Proportional Counters at the Sudbury Neutrino Observatory - INSPIRE

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An Independent Measurement of the Total Active B-8 Solar Neutrino Flux Using an Array of He-3 Proportional Counters at the Sudbury Neutrino Observatory

SNO

Collaboration

Jun, 2008

5 pages

Published in:

Phys.Rev.Lett. 101 (2008) 111301

e-Print:

0806.0989 [nucl-ex]

DOI:

10.1103/PhysRevLett.101.111301

PDG:

\Delta

{}^{2}_{21}

Report number:

LA-UR-08-1316

Experiments:

SNO

View in:

ADS Abstract Service

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Abstract: (arXiv)

The Sudbury Neutrino Observatory (SNO) used an array of 3He proportional counters to measure the rate of neutral-current interactions in heavy water and precisely determined the total active (nu_x) 8B solar neutrino flux. This technique is independent of previous methods employed by SNO. The total flux is found to be 5.54(+0.33/-0.31 stat, +0.36/-0.34 syst) x 10^6 cm^-2 s^-1, in agreement with previous measurements and standard solar models. A global analysis of solar and reactor neutrino results yields Delta m^2 = 7.59(+0.19/-0.21) x 10^-5 eV^2 and theta = 34.4(+1.3/-1.2) degrees. The uncertainty on the mixing angle has been reduced from SNO's previous results.

Note:

5 pages, 2 figures, version accepted by Phys Rev Lett, added latest KamLAND 2881 ton-year data and 192 day Borexino data

95.85.Ry
13.15.+g
14.60.Pq
26.65.+t
neutrino: solar
neutrino: flux
boson
neutrino deuteron: interaction
water: heavy
charged current

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